Date   : Sat, 03 Feb 1990 15:18:57 GMT
From   : zaphod.mps.ohio-state.edu!lavaca.uh.edu!uhnix1!nuchat!splut!jay@tut.cis.ohio-state.edu (Jay "you ignorant splut!" Maynard)
Subject: Z80MU

In article <839@qmet.UUCP> sc@qmet.UUCP (Steve Croft) writes:
>In article <766@nixpbe.UUCP>, josef@peun11.uucp (Moellers) writes:
>> As far as I know, Z80MU relies heavily on the similarities between
>> MESSDOS and CP/M to simplify the whole system.
>> You'll probably have to simulate MESSDOS or even CP/M to run Z80MU.
>Yeah, I realized this after thinking about it for awhile.  I'm sure
>Z80MU passes alotta info to MSDOS directly.  We already run it on our
>386i by running it through a DOS process; I was hoping for a method to
>get it directly on UNIX to help performance.

The .DOC file for Z80MU310 (the last version, as far as I know) mentions
that they started out by passing calls to DOS directly, but as they went
along, there were subtle incompatibilities between CP/M semantics and
DOS semantics tha they had to program around.

The heart of Z80MU is an assembly-language Z80 simulator that depends on
a unique mapping of Z-80 registers to 80x86 registers. You could
probably port that module to your 386, bu forget it for other
processors...

-- 
Jay Maynard, EMT-P, K5ZC, PP-ASEL   | Never ascribe to malice that which can
jay@splut.conmicro.com       (eieio)| adequately be explained by stupidity.
{attctc,bellcore}!texbell!splut!jay +----------------------------------------
                             Free the DC-10!


End of INFO-CPM Digest V90 Issue #18
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